Sossen was formerly part of the German Empire. In the German Empire, the place was called Sossen.
The place is now called Soseň and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Sossen | Austro-Hungary | Podersam | before the Treaty of Saint-Germain |
| Soseň | Austro-Hungary | Podersam | before the Treaty of Saint-Germain |
| Soseň | Czechoslovakia | Podbořany | after the Treaty of Saint-Germain |
| Sossen | Czechoslovakia | Podbořany | after the Treaty of Saint-Germain |
| Sossen | German Empire | Podersam | 1938 |
| Soseň | Czechoslovakia | Podbořany | 1945 |
| Soseň | Czechoslovakia | Rakovník | 1992 |
| Soseň | Czech Republic | Rakovník | 1993 |